Add Oil To The Engine; Oil Leak Check; Oil Servicing Schedule - Lycoming YO-233-B2A Maintenance Manual

YO-233-B2A Engine Maintenance Manual
TEO-540-A1A Engine Maintenance Manual
Ashless dispersant oil contains additives, one of which has a viscosity stabilizing effect,
B.
which removes the tendency of the oil to thin out at high oil temperatures and thicken at
low oil temperatures. The additives in these oils extend operating temperature range,
improve cold engine starting and lubrication of the engine during the critical warm-up
period, thus permitting flight through wider ranges of climatic changes without the
necessity of changing oil. The ashless dispersant grades are recommended for aircraft
engines subjected to wide variations of ambient temperature. It must not be presumed
however, that these oils will remove all of the problems encountered in extremely cold
environments (below +10°F (-12°C)). At these temperatures preheating of the engine and
oil supply tank will be necessary regardless of the type of oil used.

5. Add Oil to the Engine

Make sure the engine is warm or cool to touch.
A.
Remove the oil level gauge/dipstick assembly.
B.
Measure the oil level. Refer to the section "Oil Level Check" in this chapter.
C.
Add oil as necessary and measure the oil level until the oil level check shows that there is
D.
sufficient oil in the engine for the flight conditions.
Install the oil level gauge/dipstick rod securely.
E.
Lubricant Additives
F.
(1) Anti-scuffing agent oil additive (P/N LW-16702) to decrease engine wear can be added
to the oil sump during an oil change.

6. Oil Leak Check

A. Examine the engine nacelle, engine compartment, and adjacent area for oil leaks.
B. Examine the engine cylinders for leaks.
C. If leaks are found, identify and correct the cause.
D. After the cause of the oil leak is corrected, measure the oil level. Refer to "Oil Level Check"
in this chapter.
E. Add oil as necessary. Refer to the procedure "Add Oil to the Engine" in this chapter.

7. Oil Servicing Schedule

Oil changes and oil filter replacement are recommended as shown in the schedule in Table 2.
A.
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February 2021
DO NOT OVER-FILL THE ENGINE WITH OIL. IT CAN CAUSE
ENGINE DAMAGE.
DO NOT ADD TOP CYLINDER LUBRICANT, DOPES, OR CARBON
REMOVERS TO THE ENGINE. THESE PRODUCTS CAN DAMAGE
THE ENGINE (PISTONS, ENGINE RINGS, ETC.). IF YOU ADD THESE
PRODUCTS TO THE ENGINE, YOU WILL VOID THE WARRANTY.
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